Posted on Jan 6, 2013

This circuit is a high-input impedance version of the so-called diode pump or staircase generator. Note that charge transfer takes place at the negative-going edge of the input signal. The most common application for staircase generators is in low-cost counters.

Click here to download the full size of the above Circuit.

By resetting the capacitor when the output reaches a predetermined level, the circuit can be made to count reliably up to a maximum of about 10.

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